How severe is CVE-2026-4434?

CVE-2026-4434 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-4434 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4434?

CVE-2026-4434 affects Devolutions Devolutions Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4434?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-4434 have an EU (EUVD) identifier?

Yes. CVE-2026-4434 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13688.

When was CVE-2026-4434 published?

CVE-2026-4434 was published on 2026-03-20 and last updated on 2026-06-17.

CVE-2026-4434

CVE-2026-4434 is a high-severity vulnerability in Devolutions Devolutions Server with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-13688
Weakness: CWE-295
Affected product: Devolutions Devolutions Server
Published: 2026-03-20
Last modified: 2026-06-17

Description

Improper certificate validation in the PAM propagation WinRM connections allows a network attacker to perform a man-in-the-middle attack via disabled TLS certificate verification.

Frequently asked questions

What is CVE-2026-4434?: Improper certificate validation in the PAM propagation WinRM connections allows a network attacker to perform a man-in-the-middle attack via disabled TLS certificate verification.
How severe is CVE-2026-4434?: CVE-2026-4434 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-4434 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4434?: CVE-2026-4434 affects Devolutions Devolutions Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4434?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-4434 have an EU (EUVD) identifier?: Yes. CVE-2026-4434 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13688.
When was CVE-2026-4434 published?: CVE-2026-4434 was published on 2026-03-20 and last updated on 2026-06-17.

References

https://devolutions.net/security/advisories/DEVO-2026-0005/

Affected products (1)

cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:*

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